Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.6K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.4K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.4K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

879
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
879
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

2.4K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
2.4K
Valence Bond Theory02:42

Valence Bond Theory

11.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.4K
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

3.5K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
3.5K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Unlabeled but Not Unseen: Cytotoxicity Classification of Re(I) Tricarbonyl Complexes via K‑Means Clustering.

ACS omega·2026
Same author

Strain-specific synergy: an oxo-rhenium(V) complex potentiates antibiotic efficacy in <i>Staphylococcus aureus</i> strains.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Selective and sensitive recognition of Zn<sup>2+</sup> by a dansyl-derived peptide sensor.

RSC advances·2026
Same author

Alkali-Metal Base Catalyzed Electrocyclization of Isoprene Derivatives.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

A second ortho-rhom-bic polymorph of 4-{[(1<i>E</i>,2<i>E</i>)-3-(4-meth-oxy-phen-yl)prop-2-en-1-yl-idene]amino}-1,5-dimethyl-2-phenyl-1<i>H</i>-pyrazol-3(2<i>H</i>)-one.

Acta crystallographica. Section E, Crystallographic communications·2026
Same author

Peptide structure and silver ion affinity: influence on the formation of α-helices upon metal binding.

Chemical communications (Cambridge, England)·2026

相关实验视频

Updated: Feb 24, 2026

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
06:31

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

Published on: March 19, 2020

7.7K

船基异金属复合体及其潜在应用

Jocelyn Pradegan1, Aurélien Crochet1, Katharina M Fromm1

  • 1Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg 1700, Switzerland.

Crystal growth & design
|February 23, 2026
PubMed
概括
此摘要是机器生成的。

这项研究使用希夫基联体合成了新型金属复合物,并探索了它们作为混合金属氧化物的单一来源前体的用途. 与异金属复合物相比,铜 (II) 复合物表现出优越的抗菌活性.

更多相关视频

Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups
06:44

Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups

Published on: April 6, 2017

10.2K
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

10.3K

相关实验视频

Last Updated: Feb 24, 2026

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
06:31

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

Published on: March 19, 2020

7.7K
Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups
06:44

Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups

Published on: April 6, 2017

10.2K
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

10.3K

科学领域:

  • 协调化学 协调化学
  • 材料科学 材料科学 材料科学
  • 抗菌研究 抗菌研究

背景情况:

  • 希夫基联体为金属离子提供了多功能协调环境.
  • 金属复合物被研究为先进材料的单一来源前体 (SSP).
  • 了解结构-活性关系对于开发新的抗菌剂至关重要.

研究的目的:

  • 合成和表征新型单金属和异金属金属复合物.
  • 评估这些复合物的潜力,作为混合金属氧化物 (MMO) 的单一来源前体.
  • 为了研究合成的联结体和金属复合物的抗菌性质.

主要方法:

  • 希夫基联体 (H2L) 的合成及其随后的复合与过渡 (Cu,Ni) 和土 (Ca,Sr,Ba) 金属离子.
  • 使用单晶X射线衍射合成复合物的表征.
  • 选定复合物的化,以形成混合金属氧化物 (MMO),并通过扫描电子显微镜 (SEM) 进行表征.

主要成果:

  • 成功合成和结构性表征了八种新的单金属和异金属复合物.
  • 特定复合物的化产生了各种具有海绵状结构的MMOs,包括三元金属氧化物.
  • 铜(II) 单金属复合物表现出显著的抗菌活性,其抑制区是异金属复合物的两倍.

结论:

  • 合成的希夫基联体可以有效地与各种金属离子协调,形成稳定的复合体.
  • 这些金属复合物作为有效的单一来源前体,用于混合金属氧化物的受控合成.
  • 铜 (II) 复合物显示出有前途的抗菌潜力,需要进一步研究治疗应用.